Mechanism foe looms



3 Sheets-Sheet 1,

(No Model.)

C. H. THOMAS. SHEDDING MECHANISM FOR LOOMS.

Patented Mar. 27,1894.

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G. H. THOMAS. summe MEGHANISM FOR. Looms.

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(No Model.) 3 Sheets-Sheet 3.

G. H. THOMAS. SHBDDING MECHANISM FOR LOOMS.

No.517 1.29. Patented Mar. 27,1894.

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STATES PATENT OFFICE.

CARL HEINRICH THOMAS, OF NEUGERSDORF, ASSIGN OR TO 0. A. ROSOHER,

OF ALTGERSDORF, GERMANY.

SHEDDING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 517,129, dated March27, 1894.

Application fikid December 1892- Serial No. 455,963. (No model.)Patented in Germany November 7, 1891,No. 63,815-

To aZZ whom it may concern.-

Be it known thatl, CARL HEINRICH THOMAS, a subject of the Emperor ofGermany, residing at N eugersdorf, in the Kingdom of Saxony, Germany,have invented certain new and useful Improvements in Shedding Mechanismfor Looms, (for which Letters Patent in Germany, No. 63,815, bearingdate November 7, 1891, were granted to O. A. Roscher, in Altgersdorf,Germany,) of which the following is a specification.

The object of my invention is to provide shedding mechanism by which theheddles of a loom harness are positivelyoperated through theintroduction of pattern cards and cylinder; and for this purpose Iprovide mechanism to hold jacks, which are adapted to operate with theirconnecting devices the heddles of a loom harness, positively out ofcontact with the moving members of the shedding mechanism, when sorequired by the pattern cards.

The invention is illustrated in the accompanying drawings, in which-Figure 1 is a side elevation partly in section showing the sheddingmechanism mounted in a frame supported by the loom proper, and also theharness. Fig. 2 is a view showing one of the swinging guide bars inelevation. Figs. 3 and 4 show one of the swinging guide bars in sideelevation and also its operations. Figs. 5 and 7 are side elevations ofthe shedding mechanism showing the difierent positions of the operatedparts mounted in the frame supported by the loom and Fig. 6 is a planview of the shedding mechanism.

Referring now to the drawings for a further description of my invention,S are the heddles of a loom harness to be operated by my improvedshedding mechanism assembled and mounted in a frame adapted to beattached to any kind of loom. Each of these heddles S is operated bycords attached to opposite edges of the heddle and a lever S fulcrumedto the frame of the loom in the usual, or any preferred manner, so thatwhen one cord is drawn in one or the other direction,

the heddle pertaining thereto may be raised or lowered, or in otherwords, the shed may be opened or closed.

To operate the heddles S to form certain and predetermined figures inthe fabric, cards 0 fed over a cylinder 0 are employed in the usual, orany preferred manner, to cause the engagement or disengagement ofcertain devices to be presently described.

On top of the loom are secured standards F and F held together by crosspieces f, f q andq' and at the rear of said standards is journaled ashaft h, bearing at its ends and outside of the standards two levers H,whereof one is provided with an extension h to which a connecting rod kis attached to escillate the lovers H and the similar disposed levers Khinged at their centers at the front ends and outside of the standards Fand F by studsrk. Each set of levers H and K at opposite sides of thestandards F and F are connected by the links 4; so that the lovers H andK move in unison. The two levers K are connected at their upper ends toa cross bar 7' and at their lower ends to a similar bar 'r, for purposesto be described. In the standards F and F between the levers K and H areformed ways m and m for guiding knives m located at the top of thestandards and knives m located'near the bottom of the said standards,and these knives are connected to therespective ends of the levers H bylinks 2 and z. 1

For each heddle S is provided an arm Z rotatably mounted on a cross bar0 and guided by a slotted connection as at o, and the top cord of eachheddle is connected to a depending harness lever to hinged-on a crossrod 0 of the standards F and F, and each of these levers w is connectedto its corresponding arm Z by a slotted connection as shown at u. To anextension of each jack arm l is pivoted a jack lever i carrying at itsopposite ends jacks p and p which are adapted to engage with theirhooked ends the knives m and m before mentioned. A rod or shaft (2 isprovided between the standards F and F upon which a card frame D isrotatably mounted in the usual, or any preferred manner, and this frameD receives an oscillatory motion through link 01' from an eccentric ofthe loom, not shown. The card cylinder C is rotated by any suitable andknown mechanism, for instance a pawl on one of the standards and aratchet wheel on the shaft of the cylinder may be used so that when thecard cylinder 0 is descending by the manipulation of the frame D, andafter the needles n or 'n have left the cards thereof, the ratchet comesin contact with the pawl and drives the cylinder around to presentanother card at its upper face. Directly above this card cylinder 0 areprovided vertical needles, which are held in the guides N and N of theframe, there are two needles n and n for each arm Z, and one needle foreach jack p and p; the projection g on the needles n are adapted toengage the upper jacks 1), while the projections or hubs g on theneedles 0?. engage the jacks 19, all the needles n and 01. however passthrough long slots p provided in the jacks p and p, to allow a slidingmovement of the jacks caused by the knives m or m, while the needles areheld in their guides N and N.

Above the two series of jacks p and p are mounted swinging guide bars 8and s which are attached to the lower ends of arms I) fastened to rockshafts b and I). These bars 8 and s are located above the hooked ends ofthe jacks p and p and are adapted to slide under the same, when the saidjacks are lifted, by the action of springs I) attached to the upper endof the arms 17 and a member of the machine frame.

Stop arms a and c on the rock shafts b and b impinging against thecross-bars, q and q of the standards F and F are employed to limit themovement of the swinging guide bars 3 and 8 under the influence of thesprings 5 These latter are moved either in or out of the path of thejacks p and p by bent levers a. and a. adjustably attached by screw nutsto the links 2 and 2'.

In describing the operation of my improved shedding mechanism, theco-operation of the devices pertaining to one harness heddlewill bestated.

In Fig. 5 are shown the positions of the different devices heretoforedescribed, when the shed is open, and in Fig. 7 when the shed is closed.When the shed is closed the jack levers 11 lie against the cross bars fand f as in Fig. 7.

To open a shed, the needles n and n enter perforations in the cards 0 asthe cylinderC is forced upward by its frame D and link d, so that thejacks p and 19' remain in their lowest positions as shown in Fig. 5; theknife m therefore is permitted to engage the jacks p and draw the samethrough the motion of the rock shaft h and levers H to the position asshown in Fig. 5. The lower ends of the respective jack levers 11 arethereby withdrawnfrom the cross barf, while the upper ends thereof stillremain in contact with the bar f. The arms Z are thereby drawn at theirupper ends to the right in Fig. 5 and the depending levers w connectedto the arms I at 21. move also in that direction thereby raising theheddles S connected by cords to the respective levers 10. If it isdesired to keep the shed open for the next pick or number of picks, theneedles 'n and 7?. must again enter apertures in the card 0 so as not toraise the jacks p and p out of their lowest position; the levers H nowmoving in the opposite direction from that described before, the jacks pare drawn toward the right in Fig. 5 by the knife m, While the jacks pare drawn toward the left by the bar 7" impinging against the lower endsof the jack levers 2', without, however, moving the center or pivotedconnection between the respective jack lovers 7 and their arms Z, thejack levers 'isim ply moving idle about their pivotal connection y withtheir respective arms Z. If heddles S are to be depressed, thecorresponding needles n or n are raised by a non punctured part of thecards 0 on the cylinder 0 while the latter is moved upward by its frameD as described, and the hub or projection g or g on the needle elevatesthe respective jack p or At the same time the desired jack is lifted,the levers H commence to turn say with their upper end to the right torelease the bent lever a. of the link 2 to allow the swinging guide bar3 to be shifted under the hooked ends of the elevated jacks p by thesprings 11 as shown in Figs. 4 and 7. The hooked ends of the jacks 19now resting on the swinging guide bar .9 impinge against the cross bar qand the levers H now turning farther in the direction stated, also turnthe levers K in the same direction, and cause the thereto affixed crossbar 7" to move the jack levers '11 in the position shown in Fig. 7thereby pushing the upper ends of the arms Z and with it the lower endsof the depending levers w toward the left Fig. 7, closing the shed. orrather lowering the desired heddle or heddles S. If it is desired tokeep the shed closed for any time, the jacks p and p are alternatelylifted, by the needles n and 'n' and the bars 8 or .9 hold therespective jacks in their raised positions, so that the knives 'm or mpass freely under the said jacks 19 or 19'.

Having thus described the nature and object of my invention, what Iclaim as new, and desire to secure by Letters Patent, is-

In shedding mechanism for looms, the combination with the dobby frame,the pivoted harness lever w, jack lever 1', jack arm Z connecting saidlevers, two series of hooked jacks, knives, and means for operating saidknives, pattern cards and cylinder, rock shafts b I) provided with armsb bars 8 s pattern cylinder to indicate, substantially as [0 described.

Signed at Zittau, Saxony, this 25th day of October, 1892.

CARL HEINRICH THOMAS.

Witnesses:

OSKAR ALWIR BIELIGL EMIL FRITZSOHE.

